l Over-charge/Over-discharge Ability to withstand over-charge/withstand over-discharge, and there is no fire, no exploding and work welll Short circuit Ability to withstand short circuit, and there is no fire, no explodingl Acupuncture Ability to withstand nail puncturing, and there is no fire, no explodingl Thermal shock Ability to withstand thermal shock, and there is no fire, no exploding